High flow precat gains?
07-20-2012, 06:39 PM
#1
Instructor
Thread Starter
High flow precat gains?
Hey guys,
I just did a mid muffler delete today on my TL.
I'm going to be getting a j-pipe next and then probably high flow cats.
Does anyone know what the gains are on high flow pre-cats and the cat after the j-pipe?
I spoke to the guy at the shop who did my muffler mod and he said I wouldn't gain much from high flow cats. I can't use the PCD's since it would fail emissions. I live in Allegheny county near pittsburgh.
I'm wondering if PCD's would pass emissions too since they would be barely visible anyway.
I just did a mid muffler delete today on my TL.
I'm going to be getting a j-pipe next and then probably high flow cats.
Does anyone know what the gains are on high flow pre-cats and the cat after the j-pipe?
I spoke to the guy at the shop who did my muffler mod and he said I wouldn't gain much from high flow cats. I can't use the PCD's since it would fail emissions. I live in Allegheny county near pittsburgh.
I'm wondering if PCD's would pass emissions too since they would be barely visible anyway.
07-20-2012, 06:55 PM
#2
^you dont say what model your car is.
base cats have a cell count of 900.
type-s cats have a cell count of 600.
High flow cats have a cell count of 200-300
pcds are straight pipe so it has 0 cells.
from the base TL to high flow cats you'll be going from a 900 cell cat to a 300 cell.
pretty big improvement.
base cats have a cell count of 900.
type-s cats have a cell count of 600.
High flow cats have a cell count of 200-300
pcds are straight pipe so it has 0 cells.
from the base TL to high flow cats you'll be going from a 900 cell cat to a 300 cell.
pretty big improvement.
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vtec314 (04-04-2013)
07-20-2012, 07:17 PM
#3
Instructor
Thread Starter
^you dont say what model your car is.
base cats have a cell count of 900.
type-s cats have a cell count of 600.
High flow cats have a cell count of 200-300
pcds are straight pipe so it has 0 cells.
from the base TL to high flow cats you'll be going from a 900 cell cat to a 300 cell.
pretty big improvement.
base cats have a cell count of 900.
type-s cats have a cell count of 600.
High flow cats have a cell count of 200-300
pcds are straight pipe so it has 0 cells.
from the base TL to high flow cats you'll be going from a 900 cell cat to a 300 cell.
pretty big improvement.
Sounds like that would be a huge difference. I will definitely be getting them then.
07-20-2012, 08:46 PM
#4
^you dont say what model your car is.
base cats have a cell count of 900.
type-s cats have a cell count of 600.
High flow cats have a cell count of 200-300
pcds are straight pipe so it has 0 cells.
from the base TL to high flow cats you'll be going from a 900 cell cat to a 300 cell.
pretty big improvement.
base cats have a cell count of 900.
type-s cats have a cell count of 600.
High flow cats have a cell count of 200-300
pcds are straight pipe so it has 0 cells.
from the base TL to high flow cats you'll be going from a 900 cell cat to a 300 cell.
pretty big improvement.
07-20-2012, 08:53 PM
#5
Instructor
Thread Starter
Trending Topics
07-20-2012, 11:11 PM
#14
Go Pats!
^you dont say what model your car is.
base cats have a cell count of 900.
type-s cats have a cell count of 600.
High flow cats have a cell count of 200-300
pcds are straight pipe so it has 0 cells.
from the base TL to high flow cats you'll be going from a 900 cell cat to a 300 cell.
pretty big improvement.
base cats have a cell count of 900.
type-s cats have a cell count of 600.
High flow cats have a cell count of 200-300
pcds are straight pipe so it has 0 cells.
from the base TL to high flow cats you'll be going from a 900 cell cat to a 300 cell.
pretty big improvement.
Last edited by dragonsking91; 07-20-2012 at 11:21 PM.
The following users liked this post:
2022-4G-TL-Owner-Reed (12-31-2022)
07-21-2012, 10:48 AM
#16
Go Pats!
07-21-2012, 05:48 PM
#20
Suzuka Master
+2 here!
07-21-2012, 08:13 PM
#22
05' AT SSM
07-21-2012, 08:20 PM
#23
^you dont say what model your car is.
base cats have a cell count of 900.
type-s cats have a cell count of 600.
High flow cats have a cell count of 200-300
pcds are straight pipe so it has 0 cells.
from the base TL to high flow cats you'll be going from a 900 cell cat to a 300 cell.
pretty big improvement.
base cats have a cell count of 900.
type-s cats have a cell count of 600.
High flow cats have a cell count of 200-300
pcds are straight pipe so it has 0 cells.
from the base TL to high flow cats you'll be going from a 900 cell cat to a 300 cell.
pretty big improvement.
The following 2 users liked this post by justnspace:
LowNstocK_UA6 (12-02-2020),
StealthTL-S (04-08-2014)
07-22-2012, 12:53 PM
#28
Suzuka Master
iTrader: (2)
From what I can deduct from Justin's post, a base TL will yield the biggest improvement while PCDs for a type-s will only be a small improvement considering the type-S already has higher flowing cats than the base. Although, the Honda manufacturers decided to add to production costs by making two different sets of cats for the base and type-s and there really isn't that great of a difference in cell count so maybe a little bit does help? You would be going from 600 cells to 1 cell.
High flow cats do not, in and of themselves. add rasp. I have none.
The following 2 users liked this post by anx1300c:
Andy Tsang (07-22-2012),
Sonnick (08-28-2012)
07-22-2012, 12:55 PM
#29
I read a tech article a while back that said when the type s came out 6hp was gained from going to 600 cell cats from 900 on the base. This makes sense because the 4g TL has the same engine as the type s but is rated at 280 since it has 900 cell cats vs 286 in the type s with 600 cell cats. Using that logic, I bet you would get 6hp for every 300 cell you lost on your primary cats. If I come across that article again, I will post the link.
My best guess is that on a base TL you will get:
6hp going to type s cats
12hp going to HFC
18hp going to PCD
Shameless plug: If you want the most gains possible, buy my V3 RV6 PCD for sale in the Black Market
My best guess is that on a base TL you will get:
6hp going to type s cats
12hp going to HFC
18hp going to PCD
Shameless plug: If you want the most gains possible, buy my V3 RV6 PCD for sale in the Black Market
07-22-2012, 12:56 PM
#30
A Type-S will still gain heavily from the full deletes. Going from 600 cell cats to straight pipes is still a vast improvement. In theory, it's the same flow improvement as going from the stock 900 cell base cats to the 200-300 cell HFC's.
High flow cats do not, in and of themselves. add rasp. I have none.
High flow cats do not, in and of themselves. add rasp. I have none.
07-22-2012, 01:05 PM
#31
Suzuka Master
iTrader: (2)
Nice thing about the HFC's is you don't have to worry about hacking into your exhaust and adding a huge resonator if the rasp gets annoying. My Excelerate cat back is the resonated version, but the resonator is so tiny I don't think it's doing much.
07-22-2012, 10:55 PM
#35
Definitely. I'm not too concerned with emissions. It's not too hard to swap everything out or just swap the factory J-pipe back in. And the smell really isn't that bad. Ever go to a drag strip and smell all the uncatted cars there? Same thing.
07-22-2012, 11:30 PM
#36
Safety Car
07-23-2012, 12:02 AM
#39
Suzuka Master
iTrader: (2)
I read a tech article a while back that said when the type s came out 6hp was gained from going to 600 cell cats from 900 on the base. This makes sense because the 4g TL has the same engine as the type s but is rated at 280 since it has 900 cell cats vs 286 in the type s with 600 cell cats. Using that logic, I bet you would get 6hp for every 300 cell you lost on your primary cats. If I come across that article again, I will post the link.
My best guess is that on a base TL you will get:
6hp going to type s cats
12hp going to HFC
18hp going to PCD
Shameless plug: If you want the most gains possible, buy my V3 RV6 PCD for sale in the Black Market
My best guess is that on a base TL you will get:
6hp going to type s cats
12hp going to HFC
18hp going to PCD
Shameless plug: If you want the most gains possible, buy my V3 RV6 PCD for sale in the Black Market